refactor: update Vault secret paths to new categorized structure

- minio: minio → storage/minio, minio-s3-credentials → storage/minio-s3-credentials
- pgweb: pgweb → storage/pgweb
- postgresql: postgresql → storage/postgresql
- velero: minio → storage/minio, velero → storage/velero
- zot: zot → storage/zot

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

postgresql/manifests/secret.yaml

@@ -19,7 +19,7 @@ spec:
   data:
     - secretKey: password
       remoteRef:
-        key: postgresql
+        key: storage/postgresql
         property: PASSWORD
 
 ---
@@ -44,5 +44,5 @@ spec:
   data:
     - secretKey: password
       remoteRef:
-        key: postgresql
+        key: storage/postgresql
         property: PASSWORD